ICP CSA6 Installation Instructions Manual - Caution

INSTALLATION INSTRUCTIONS

R−410A Split System Air Conditioner

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7

Specifications subject to change without notice.

Start−Up

CAUTION

!

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this caution may result in minor personal

injury, equipment damage or improper operation.

To prevent compressor damage or personal injury,

observe the following:

S Do not overcharge system with refrigerant.

S Do not operate unit in a vacuum or at negative

pressure.

S Do not disable low pressure switch in scroll compressor

applications.

S Dome temperatures may be hot.

CAUTION

!

PERSONAL INJURY HAZARD

Failure to follow this caution may result in personal injury.

Wear safety glasses, protective clothing, and gloves

when handling refrigerant and observe the following:

S Front seating service valves are equipped with

Schrader valves.

CAUTION

!

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental

damage.

Federal regulations require that you do not vent refrigerant

to the atmosphere. Recover during system repair or final 

unit disposal.

Follow these steps to properly start up the

system:

1. After system is evacuated, fully open liquid and vapor

service valves.

2. Unit is shipped with valve stem(s) front seated (closed)

and caps installed. 

Replace stem caps after system is opened to

refrigerant flow.  Replace caps finger−tight and tighten

with wrench an additional 1/12 turn

3. Close electrical disconnects to energize system.

4. Set room thermostat at desired temperature. Be sure

set point is below indoor ambient temperature.

5. Set room thermostat to COOL and fan control to ON or

AUTO mode, as desired. Operate unit for 15 minutes.

Check system refrigerant charge.

Check Charge

Factory charge amount and desired subcooling are shown

on unit rating plate. Charging method is shown on information

plate inside unit. To properly check or adjust charge,

conditions must be favorable for subcooling charging.

Favorable conditions exist when the outdoor temperature is

between 70_F and 100_F (21.11_C and 37.78_C), and the

indoor temperature is between 70_F and 80_F (21.11_C and

26.67_C). Follow the procedure below:

Unit is factory charged for 15ft  (4.57 m) of lineset. Adjust

charge by adding or removing 0.6 oz/ft of 3/8 liquid line

above or below 15ft (4.57 m) respectively.

For standard refrigerant line lengths (80 ft/24.38 m or less),

allow system to operate in cooling mode at least 15 minutes.

When operating with the Observer Wall Control in

communicating mode, make sure that indoor airflow is set to

“efficiency” during charging. If conditions are favorable, check

system charge by subcooling method. If any adjustment is

necessary, adjust charge slowly and allow system to operate

for 15 minutes to stabilize before declaring a properly

charged system.

If the indoor temperature is above 80_F (26.67_C), and the

outdoor temperature is in the favorable range, adjust system

charge by weight based on line length and allow the indoor

temperature to drop to 80_F (26.67_C) before attempting to

check system charge by subcooling method as described

above.

If the indoor temperature is below 70_F (21.11_C), or the

outdoor temperature is not in the favorable range, adjust

charge for line set length above or below 15ft (4.57 m) only.

Charge level should then be appropriate for the system to

achieve rated capacity. The charge level could then be

checked at another time when the both indoor and outdoor

temperatures are in a more favorable range.

NOTE: If line length is beyond 80 ft (24.38 m) or greater than

20 ft (6.10 m) vertical separation,  See Long Line Applications

Guideline for special charging requirements.

Major Components

Control Board

The AC control board controls the following functions:

S Compressor contactor operation

S Outdoor fan motor operation

S Compressor external protection

S Pressure switch monitoring

S Time Delays

Field Connections

When using communicating control, 4 field wires are required

to be connected to the factory wires already wired to the

DX+DX−C R terminal (see Fig. 10).  Unit as provided by

manufacturer is set up for communicating control.

When used with a standard non−communicating thermostat,

it is recommended to use 3 thermostat control wires to be

connected to R, Y and C. When using 3 wires, all diagnostic

and time delay features are enabled (See Fig. 11).

Disconnect factory provided wires from DX+, DX−, C & R

terminals.  Using factory provided wires, connect to R, C, and

Y on the control board for 3 wire thermostat control.  Connect

field 24V wires to factory provided wires now connected to R,

C, and Y and cap both sides or remove unused factory

provided wires.

When only 2 thermostat control wires are available, units will

function, but some control features are lost. (See Fig. 12).

With only 2 wires connected, the circuit board will be

powered down whenever there is no call for cooling, and the

following will result:

S Compressor time delay is reduced from 5 minutes to 10

seconds

S When the thermostat is not calling for cooling, the amber

status light will be off, and no diagnostics codes will be

available

S All system counters will be reset on each new call for

cooling